Intel EP80579 User Manual

Intel

®

 EP80579 Software for Security Applications on Intel

®

 QuickAssist Technology

August 2009

PG

Order Number: 320183-004US

69

1. Populate the symmetric operation data structure
2. Call the symmetric operation perform API

With the following steps which are used for partial packets:

1. Populate the symmetric operation data structure and set packet type to partial
2. Call the symmetric operation perform API
3. Repeat steps 1 & 2 above for each partial packet which needs to be processed
4. For the final partial packet initialize the symmetric operation data structure and set 

the packet type to last partial

5. Perform the operation

Steps 1) and 2) may be repeated according to number of partial packets requiring 

Cipher/Hash/Authentication.

The size of the data to be Hashed or Ciphered must be a multiple of the block size of 

the algorithm for all partial packets except the last partial.

For Hash/Authentication the digest pointer and the digest verify flag are only used for 

the last partial.

Algorithm chaining involves performing a cipher followed by a hash or a hash followed 

by a cipher in one operation. Authenticated-encryption involves performing a 

authenticate followed by a cipher in one operation.

Sample code is provided for algorithm chaining operations; see 

the API manual. The basic steps involved in performing an operation are detailed 

below.

1. Initialize a session, see 

2. Allocate memory for the source and destination buffer lists

• For an in-place operation, only memory for the source buffer list needs to be 

allocated

3. Allocate memory for the symmetric operation data
4. Populate the appropriate symmetric operation data structures, see the API manual
5. Call the symmetric operation perform API one or more times
6. Completion of operation, see 

7. Remove session, see 

Refer to the API manual for full details of Key and Mask Generation operations.

1. Define a Flat Buffer callback function as per the API prototype, see the API manual. 

If synchronous operation is preferred, instead simply pass NULL to the API for the 

callback parameter.

2. Allocate memory for the operation 
3. Populate data for the appropriate operation data structure, see the API manual

• Fill in the Flat Buffers; pointer to data and length
• Fill in the options for the operation required

4. Call the appropriate Key or Mask Generation API